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Archives for Chicago's hourly weather data updated 24-48 hours after end of each day. MOBILE CHGOWX.COM ...
Weather conditions on bar directly above are near Lakefront. Weather conditions with Moon are O'Hare (official).

Tuesday, November 9, 2021

SPC Nov 9, 2021 1300 UTC Day 1 Convective Outlook

SPC 1300Z Day 1 Outlook Day 1 Convective Outlook NWS Storm Prediction Center Norman OK 0633 AM CST Tue Nov 09 2021 Valid 091300Z - 101200Z ...THERE IS A MARGINAL RISK OF SEVERE THUNDERSTORMS WESTERN WA... ...SUMMARY... A brief tornado or locally damaging wind event is possible this afternoon, mainly across a portion of western Washington. ...Western WA/northwest OR... A strong shortwave trough will spread inland later this morning with a pocket of -30 C 500-mb temperatures centered on western WA this afternoon. As the Pacific surface front advances farther inland, westerly onshore flow in conjunction with the cooling mid-levels will result in a destabilizing air mass. Scattered low-topped convection is expected this afternoon with sporadic lightning flashes in the more intense cells. Favorable low-level speed shear should yield adequate hodograph curvature to foster a conditional threat for a transient supercell. But scant buoyancy will most likely preclude a more substantial severe threat beyond a low-probability tornado and/or damaging wind event. ..Grams.. 11/09/2021 Read more LIVE: spc.noaa.gov
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